A wind turbine rated at 250 KW costs $450,000 and has a swept (rotor) area of 1200 m2. It is installed at a location with year-round average power density available in the wind of 320 W/m2, and on average converts 25% of the energy into electricity. The electricity is sold to the grid at $0.039/KW-hr paid at the location of the turbine (i. e, no transmission costs). The project has a 20-year lifespan with a salvage value of $20,000 at the end of its life. The interest rate is 8%. Calculate the present value of this investment.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10